Manufacture of glassware



I (No Model.)

- G. W. BLAIR.

MANUFACTURE OF GLASSWARE.

No. 604,959.: PatentedMay 31,1898.

- WITNESSES INVEN'I'OR so Figure l'is a longitudinal sectional View of20 article then UNITED STATES PATENT OFFICE.

enonen w. BLAIR, or r r'rsnnne, ENNSYLVANIA."

MANUFACTURE OF GLASSWARE.

SPECIFICATION forming part of Letters Patent No. 604,959, dated May 31,1898.

.llpplication filed Man 27,18 1. stun lie-629.505. (llomodelb To allwhom it may concern: n r, Aft th bla k Be it known that I, GEORGE W.BLAIR,'Of is expanded in a Pittsburg, in the county of Allegheny and perend or neck State of Pennsylvania, have invented a new by the ring 3 andby a-blowpipe 7, having a ,5 and useful Improvement in the Manufacture lr of Glassware, of which the following is a full, blank. The body ofthe" mold up to the level clear, and exact description, reference beingof the dotted line 8 8 is of the contour of the 1 had to theaccompanying drawings, forming tumbler or finished article. The blank 5is part of this-specification, in whichplaced within the matrix of themold and is expanded therein by blowing, the result being an article ofthe shape such as shown in Fig. 2. This article is then moved from themold. Its upper part is cracked off on the.

line 8 8, thus removing the neck or pressed 15 manufacture of bottlesand similar articles to portion of the blank and an adjacent part ofemploya combinedmethod of pressing'and; the blown body portion. Thearticle then, blowing by which." a lank has first been after having itsupper edge fire-finished, is pressed and the upper-end thereofsimultafitted for use. neously pressed into finished shape and the Theadvantage of this mode manufacfinished by expanding and blowtureis thatit enables the article to be made ing in amold. Such method, however,has with very little cost and very rapidly, with its not-heretofore beenpossible upper portion as thin and shapely as is made nufacture oftumblers and like articles,

by -the ordinary process of blowing. The adrlthe upper ends of blowntumblers should be no thicker than the body of the tumbler vantages ofthe invention in this regard will I be appreciated by those skilled'inthe art. and should be more shapely and regular than ible to obtain bypressing.

' My invention may be applied to the manufacture'of many glass articlesand is suscepivention affords meanswhereby the tible of modification inthe form of construcabove mentioned, withall its attendtioIn :{ndapparatus used. c aim-- Y The method of making glass articles, whichconsists in forming a blank with a neck por- 5 has been molded itblow-mold cavity 6, the uprny apparatus, showing the pressin g-moldcavity in use. Fig. 2 is a like view showing the "glass while beingexpanded by blowing.

It has been the practice heretofore in the 3b anta r to the manufactureof tumblers and such articles; and it consists in a mold wherein apreviously-pressed" small blank is expanded,

said mold having a body part, a portion of 5 which is of the shape-ofthe finished article, and a supplementary neck portion wherein the blankis held during the blowing operaing the body portion by blowing, and encutting offthe said neck portion and\ an adjacent part of the blown bodyportion, and from the remainder of the body portion contion. The articleformed in this mold is stitutin g the finished article, substantially asfinally finished by cracking off the suppledescribed.- I 4o mental neckportion and an adjacent portion In testimony whereof I have hereunto setof the blown body, the renflainder of the body my hand. ortion thenbeing fitted or use. Pin the drawings, 2 is the matrix-cavity in 4GEORGE LLAIB which the blank is molded. It has a ring \Vitnesses:

desired, the mold Io snw man- ),5 and may a plunger 4:, and, if

be made in two parts in the usual of the blank bein g then held tion anda body portion by pressing, expand-- month, which is fitted withinthe-neck of the

